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Validity and Reliability of a Portable Isometric Mid-Thigh Clean Pull
Lachlan P James1, Llion A Roberts, G Gregory Haff
11School of Human Movement and Nutrition Sciences, University of Queensland, Queensland, Australia;2Center for Sport and Exercise Science Research, Edith Cowan University, Perth, Australia; and3Brisbane Broncos Rugby League Football Club, Queensland, Australia.
Journal of Strength and Conditioning Research
|April 18, 2017
Summary
A portable isometric mid-thigh clean pull (IMTP) device shows high reliability and acceptable validity for measuring peak force. This cost-effective tool offers a practical alternative for assessing maximal force production.
Area of Science:
- Sports Science
- Biomechanics
- Strength and Conditioning
Background:
- Assessing maximal force production is crucial in strength and conditioning.
- Traditional methods often require specialized equipment like force plates.
- Portable devices offer potential for wider accessibility.
Purpose of the Study:
- To determine the test-retest reliability and criterion validity of a portable isometric mid-thigh clean pull (IMTP) device.
- To compare force-time data from a portable IMTP (IMTPl) with a force plate-based IMTP (IMTPf).
Main Methods:
- Fifteen resistance-trained males participated in two testing sessions.
- Participants performed IMTP under criterion (IMTPf) and experimental (IMTPl) conditions.
- Force-time data, including peak force, were collected and analyzed for reliability and validity.
Main Results:
- The portable IMTP (IMTPl) demonstrated very high reliability (ICC=0.96) and acceptable validity (ICC=0.88) for peak force measurement.
- Significant differences were observed between IMTPf and IMTPl (p < 0.0001).
- Other force-time variables lacked acceptable validity and reliability with the IMTPl.
Conclusions:
- The portable IMTP (IMTPl) is a reliable and valid tool for assessing peak force.
- It serves as a cost-effective and portable alternative to traditional IMTP setups.
- Practitioners should acknowledge the slight differences between IMTPl and IMTPf when interpreting data.